Roll-film camera



Puentes sept. 15,1931

' UNITED STATES PATENT oFF-rca 08m IESSTER, 0I Dm, NEAR BERLIN, GERIANY BOLL-Frm: amm

Application med November 13, 1989, Serial ll'o. 406,939, and in 'Germany December 10, 1996.

This invention relates to roll-film cameras distance equal t0 the length of a picture (by of the type in which a strip of'film is held the solid surface of the roller) and then reflat, prior to and during veach exposure, main stationary during the passage of the against a wall of the camera by compressed gap c. air. In the example shown, the shaft c of the Theobject of the invention is generally to feed roller carries a keyed cone pinion m, improve the construction and operation of which gears with 'a cone pinion m on the such cameras and, more particularly, to make shaft n, which latter shaft is provided at the them suitable for taking serial pictures, for top with a cam o co-acting with a plunger fr example in landscape. bearing on the diaphragm e. The shaft n According to the invention the device sup- S also provided at its upper end with a inplying the compressed air to the camera is ion 8 gearing with a' pinion s on a sha t t. coupled to the shutter` mechanism and to the A Cam u 0n the Shaft t aCtuateS a cam 'u' 0n means for feeding the film, the arrangement` a Shaft t', the members u, u working the being such that the atmosphere in the camera Sllllttel' meChaIliSm in kIlOWIl milllllel'- It S 65 is compressed during the exposure, but is ev1dentthat,1n this manner, the diaphragm relieved during the feeding of the film. e is posltlvely connected with theilm feed The drawings diagrammatically illustrate 0n the one hand and the shutter mechanism a typical embodiment 0f the invention, on the other, so that the above described op- Fig. 1 is a sectional elevation of the camera. eratiOIl iS performed automatically. 70 Fig. 2 is a Sectional plan'on 1in@ A A of The plate c 1s provided with marginal Fig. 1. apertures f, disposed interiorly in relation The camera body b, which carries the lens to a Packing mnrglnal StrlP 9 mounted ln the a, and the wall c of which, opposite the lens, body o end dlreeted toWarflS the baeklng forms the surface against which the strip d Plate, Sald apertures' also ly lng 1n the Path 75 of film is pressed, is provided with a device traversed by the hlm d, So that, on Compresfor delivering compressed air, such as a dia- S1011 of the alr 1n the Camere, the oloenlngs phra'gm pump e which is positively coupled, f re elosefl by the hlm, Yt'hllet the Paellng by means of suitable members, with the shuts trlP g Whloh, as Shown 1n Flgla Proleets ter mechanism on the one hand and the means hhe a flange over the ed of the Plate 0, for actuating the film on the other, in such a forms a tlght lolnt between the, l)olly b and way that, at the moment of the exposure, that the Plate 0- The alr Present under that Por is, when the intermittently fed film is statlon of the lllln Whleh 1S to be Pressed flat tionary, air in the interior of the body b is temporarily is able to eSeePe through the compressed and acts against the lm din the oPenlngS f and the holes h' 1n the lhn oase ,t- 85 direction of the arrows, thereby pressing the When the 'fee-d movement of the film recom' film 'against the wall c, as indicated by then lnenees, the openlngs f are uncovered egelhv continuous lines in Fig. 1. n \-Smc.e. the. stlflp 0f' film tends ifo risum? the The intermittent feed movement of thepolstw.n lndlcategalurln llgs I lg ggg cg; E;fggggflggsigfogg nnnnnnnns nnn nnnnnnf ny nnn invnnnnn the unwinding spool z' to the' winding spool gngv clgrgttvhleclheri', between two rollers j and j', of which 1 In a rlplm camera a camel-bod ils Provided With e Peripheral gap k and ls of having a lens and a shutter mounted there-7 95 such dimensions that the portion of the pe? l in, a rear box portion on the camera body, riphery of said roller adJommg the gap coractuating means for periodically advancing responds to the length of the picture. Conand stopping the films before the lens, cosequently, as the roller y 1s rotated, the strlp ordinating means for operating the shutter of lm will be alternately1 fed forward a and creating an air pressure 1n the camera 100 body while the film is in a halted position, comprisin a revoluble shaft'n engagement with the m actuating means, a diaphragm having a piston attached thereto, a cam onv 4 5 the shaft making contact with the piston and connecting means between the cam and said shutter.

p 2. A roll-film camera comprising in com'- bination, a lens, a shutter, a camera body l having a chamber formed therein, supporting vsaid lensand shutter, a rear box portion associated with said camera body, a wall intermediate said box portion and said camera body having a series of holes therethrough adapted to be closed periodically by the film Y when compression is vcreated in Jthe body chamber, actuating means for intermittently 'feeding the film infront of the intermediate wall, a main shaft connected tothe actuating means, 'a cam on the end of said shaft, a diaphragm for periodicall creating an air pressure in the body cham r when the diaphragm is operated, a piston connected to the diaphragm and actuated bythe cam, a second cam shaft geared to the main shaft, and

means Aconnecting the second `cam shaft with the shutter for operating same when air pressure is created in the body chamber, anda film is temporarily halted in front of the intermediatc wall. *f

s In testimony whereof I afiix my signature.

OSKAR MESSTER. 

